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graphic: 0.618
device: 0.461
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ppc: 0.322
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virtual: 0.249
vnc: 0.244
PID: 0.234
user-level: 0.233
i386: 0.204
kernel: 0.200
hypervisor: 0.198
arm: 0.189
TCG: 0.155
x86: 0.153
mistranslation: 0.148
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[riscv/regression] Missing tlb flush introduced in refactoring

Hello,

In qemu-system-riscv64, following a QEMU update, I get all sort of weird and not easily reproducible crashes in my risc-v guest.

I have bissected this issue to commit c7b951718815694284501ed01fec7acb8654db7b.
Some TLB flushes were removed in the following places:
target/riscv/cpu_helper.c: `csr_write_helper(env, s, CSR_MSTATUS);` -> `env->mstatus = s;` (twice)
target/riscv/op_helper.c: `csr_write_helper(env, s, CSR_MSTATUS);` -> `env->mstatus = s;` (twice)

Adding TLB flushes in all 4 places fixes the issues for me.

Hello,

Thanks for reporting a bug.

Can you please include details to reproduce the problems that you are seeing? This includes images and command line arguments.

Do you also mind including the diff of what fixes the problem for you?

Alistair

It has been solved thanks to the mailing-list members.